Buzz round satisfactory bunk (5)
I believe the answer is:
hokum
'bunk' is the definition.
(thesaurus)
'buzz round satisfactory' is the wordplay.
'buzz' becomes 'hum' ('hum' can be a synonym of 'buzz').
'round' means one lot of letters goes inside another.
'satisfactory' becomes 'ok' ('ok' can be similar in meaning to 'satisfactory').
'hum' placed around 'ok' is 'HOKUM'.
(Other definitions for hokum that I've seen before include "Claptrap" , "Nonsense (colloq.)" , "Bunk" , "Sentimental stuff in play or film, nonsense" , "Hogwash" .)